Track of the wolf and Rocky mountain cartridge company are the only sores for 10ga brass that I know of. $7.00 to $10.00 a round last time I checked. Havn't been able to find any paper hulls. There is a company that makes the paper tubes that you can put together with the brass part of your old hull but also expensive. $200.00 for 25 brass cases, just can't get there from here. Once fired Rem hulls from precision reloading is the way to go. $25.00 a 100.